need a bit of help

[johnd]

hi all a mate has got a SHOGUN 3.0l v6 gdi petrol 51 plate with an auto box.

i had a look at it as the dealer told him he needs a decoke and it will cost him £3000 . yer thats what i thought .

anyway the problem is , it drives ok if you dont push it , but if you floor
it it attempts to drop down a gear but then shudders ( feels the same as if you hit a rev limiter) and i dont think it knows what gear to select .

if you knock it into neutral the engine revs fine i think it is a box fault .
any help .
and yer i told him to bin it but he will not listen to me .

thanks.
john

[darkdezigns]

gearbox u/s ,although may just need oil in the box

[johnd]

gearbox u/s ,although may just need oil in the box

i have topped up the atf and still the same.
john

[surfenstein]

i have topped up the atf and still the same.
john

take the sump down and make sure the filter screen is clear of debris.or it could be the torque convertor.

[johnd]

take the sump down and make sure the filter screen is clear of debris.or it could be the torque convertor.

will try that thanks.
john

[MattF]

If you have a local place that repairs/services auto boxes, ask them to take a peek. They are usually quite reasonable for general work.

[JUDWAK]

take the sump down and make sure the filter screen is clear of debris.or it could be the torque convertor.

yep i would agree with that mine was doing the same
well close to what your is doing
new convertor fixed it for me filter was blocked too